Telescope.



P. FERBER. TEL'EscoPE. APPLICATON FLED FB. I. 1913.

Patented A111127, 1915.

,t *Invent-o a Atty P. FERBER.

TELEscoPE.

APPLICATION FILED FEB. I. |913.

Patented Apr. 27, 1915.

2 SHEETS-SHEET 2.

Inventor:

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adjusted to a point exactly on a distant TED sTAs PATENT OFFICE.

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' 'rEEEscoPE Specification ofLetters ratent.

I Patented Apr. 27, 1915.

application med ebmary 1, 191s. serial No. 745,613.

ToaZZ 'whom it may concern.'

Beit lmown that I, PHILIP FEREER, a citizen of the United States,residing at Hohoken, inthe county of Hudson and State 4ofNew Jersey,have invented certain new and useful Improvements inv Telescopes, oflwhich the following is a specification.

This invention relates-to bore-sight telescopes or telescopes designedto assist in bringing the bore of a'gun of large caliber target, and itsnovelty consists in the constructionand adaptation of the parts, as willbe more fully hereinafter pointed out.

To attain the `end sought for, the line "of sight through the telescopemust bebrought exactly parallel to the axis of the bore of the gun withwhich it isto be used. For this purpose the telescope is removably andtemporarily mounted in some suitable manner in the breech of the gun. Acentering point is attached to the gun at or near the muzzle forinstance, formed by cross wires in a framework removably insertedin thegun, and when the cross wires of the telescope bisect this centeringpoint thevline of sight of the telescope should be parallel to the boreof the gun, so that when the telescope is sighted on the distant targetthe line of sight of the gun should be exactly in line with this targetprovided, of course, the telescope is in proper adjustment. ln order tosecure such proper adjustment it .is necessary. that means should beprovided for moving `the cross wires in the telescope in both a verticaland horizontal direction and also means for revolving the telescope uponits longitudinal axis. is necessary that the adjusting screws for thecross wires should be within reach of the operator at all times, andprovision should bemade for revolving the telescope in a trulycylindrical bearing, the axis of which is coincident with thelongitudinal axis of the telescope. sion should be made for focusing allobjects at dierent distances because, if the telescope is only capableof being focused on a distant object, the centering point at the muzzleof the gun cannot be distin- To that end ity Furthermore, provi-Vguished; and on the contrary if it is ronly capable of being focused ona near object,

for instance, on the centering point at the muzzle of the gun, thedistant target con- ,not be properly distinguished.

I have, in the invention which is the subject matter of thisapplication, endeavored to overcome the objections heretofore exist-ling in instruments of this class and have fulfilled the requirementswhich I have out'- lined as necessary to a'proper accomplishment of theobject sought. The invention includes a telescope comprising an innertube containing the lenses and an outer sleeve with two intermediatebearings between them, one a spherical bearing and another a trulycylindrical bearing in line .with the spherical bearing. Also, a systemof cross Wires arranged in an eye-piece tubeslidably movable within themain tube of the telescope, and means for adjusting l such cross wires,and further means for adjusting the inner-tube of the telescope withrespect to its outer sleeve and maintaining it in position after suchadjustment.

In the drawings, Figure l is a side elevation of a telescope embodyingthe invention; FigQ 2 is a longitudinal central section thereof; Fig. 3isa side elevation of the device, a portion being cut away to showconcealed parts; Fig. 4 is a transverse section on the plane of the line4--4 in* Figfl, and Fig. 5 is a section similar to that shown in Fig. 4but exhibiting four screws instead of two. j

ln the drawings, 10 is the usual tube of a telescope provided at one endwith an objective indicated at 11 and at the opposite end with aneye-piece indicated at 12, 12, 12, 12, the different lenses beingcarried in a tube- 120 lmounted to slide in a sleeve 121 also within thetube 10 by means of a ring 122, and` a terminal collar 123 mountedagainst the outer side Ofsaid ring 122.

Loosely mounted to surround the tube 10 fora substantial portion ofitslength is a cylindrical sleeve 13y expanded by a shoulder 130 to forman annular flange 131 terminating in a ring 132 provided with bothexternal and internal threads. A second cylindrical sleeve 14 alsosurrounds the tube 10 and at a slight distance therefrom, and beingthreaded at one end to engage the ring 132, is rigidly secured to thesleeve 13 l are exactly parallel to the longitudinal axis of thetelescope, and which collar is arranged in the zone of the set screws140 of the hold-I ing piece 141. An annular portion of the tube 13indicated at 133 is adapted to bear against one of the bearings 15 andan intermediate annulus 134 threaded into the flange 131 of this tube 13is adapted to bear against the other of the bearings 15.

It is obvious that when the adjusting screws 140 are moved the tube 10as a whole will be moved within the tube made up of the twocylindrical-sleeves 13 and 14 as a whole but always moved upon thespherical bearings 15, 15, and adjustable in any direction permitted bythe movement of the set screws 140 which are so arranged as to providefor such movement in every desired direction. l

The tube 120 of the eye-piece is provided near its outer extremity withcross wires 17 held in position' by adjustable threaded members 170, andthis tube 120 is slidably mounted within` a second tubular member 125,its movement being limited by means of a stop member indicated at 126.

It will be observed that the sleeve 13 is externally threaded and thereis provided an annular nut 18 which is adapted to be placed over thissleeve and to move along the same. This threaded sleeve and nut inconnection with the lshoulder 130 on the sleeve 13 is intended as ameans for mounting the telescope within the bore of the gun. This Aisaccomplished by means of a temporary framework inserted transverselywithin the bore of the gun and having a central annulus, the innerperiphery of which is vthreaded to engage the external threads of thesleeve 13. This transverse frame is the usual form of means for mountingthe telescope within the gun, and no further description of it is neededto those skilled in the art. j

The manner of using the device is as follows: The telescope is insertedvin the transverse frame and the nut 18 is adjusted to hold it irmly inposition. The gun is provided with a centering point, usuallyestablished at the muzzle, as before stated, by means of a ring insertedat the muzzle having cross wires or other indicator at the center of thebore. Such centering point having been inserted and thetelescope havingbeen placed in the temporary frame above referred to, the telescope isthen pointed at this central point and revolved in its longitudinalaxis, and the adjusting screws 140 resting against the cylindrical ofsight of the telescope remains truly pointed on the centering point atthe muzzle of the gun. In Fig. 3 there is illustrated the manner inwhich the manipulation of the screws 140 will relatively move thetelescope tube and its sleeve. The bore of the gun is then in a trueline of collimation with the line of sight of the telescope. Thetelescope can then be sighted at any distant point as a target, and whenso sighted the bore of the gun is in true line with the target, and theeye-piece can be focused on such distant point by sliding the tube 120in or out until the image is sharply defined.

What I claim is:

1. A telescope comprising a tube having an objective in one end, asleeve in the other end, an eye piece slidable in the sleeve and havingcross wires, means for limiting the sliding movement of the eye piece inthe sleeve, and means for supporting the telescope and laterallyadjusting the same in the bore of a gun. v

2. A telescope comprising a tube provided at one end with an objectiveand at the opposite end with a slidable eye-piece carrying cross wires'which move with it, a sleeve adapted to surround the tube, a sphericalbearing intermediate the tube and the sleeve, a cylindrical bearing onthe outside of the tube arranged between the spherical-bearing and thecross wires, and adjusting means for moving the sleeve and tuberelatively and in a direction transverse to their longitudinal axes.

3. A telescope comprising a tube provided at one end with an objectiveand at the opposite end with a slidable eye-piece carrying cross wireswhich move with it, a sleeve adapted to surround the tube, a sphericalbearing intermediate the tube and the sleeve,

a cylindrical bearing'on the outside of the tube arranged between thespherical bearing and the cross wires, and means carried by the sleeveand adapted to coperate with the tube to move the sleeve and tube relalbearing 16 are manipulated until the line ico tively and in azonetransverse to their loni gitudinal axes, and which means includeadjusting screws threaded into the sleeve and impinging upon thecylindrical bearing.

4. A telescope comprising a tube provided at one end with an objectiveand at the opmove the sleeve and tube relatively and in posite end witha slidable eye-piece carrya. zone transverse to their longitudinal axes.10 mg cross wires which move with it, a. sleeve In testimony whereof Iaffix my signature surroundin the tube, a, universal joint bein presenceof two witnesses.

5 tween the eeve and tube, a. c lindrical bear- PHLIP FERBER.

ing on the outside ofthe tu e, and adjust- Witnesses: ing screwsthreaded onto the sleeve and im- BOWDEWINE B. VAN Smm,

pinging upon the cylindrical bearing 01'1'0 FREUND, Jr.

